Cookies in Apache HTTP Client - Java

Question

I'm having kind of a problem with the Apache httpclient for Java. I'm writing a login bot for a website, which extracts all the fields from the login forms, fills in username and password and logs into the account by making a POST request. I tried it using the classes provided by java, but there I got thrown back to the login page every time. It seems to work with the Apache client, but I tried to remove all the cookie handling code to see if it still works. I no longer save cookies in a list and I don't add cookies to the request, but it seems that I'm still getting logged in correctly. How can that be? I don't use a cookiestore and I don't know where the cookies are coming from, so obviously they must be saved somewhere in the background. I need to clear them to start a new session. I create the client like this

    CloseableHttpClient client = HttpClients.createDefault();

and make requests like this

HttpPost post = new HttpPost(url+"/login");
HttpResponse response = client.execute(post);

user7164998 · Accepted Answer · 2016-11-16 02:28:36Z

My English is poor. The cookies are actually coming from CookieStore.But the cookies aren't operated in execute(HttpUriRequest request). If you want add or remove cookies.you can use execute(HttpUriRequest request, HttpContext context) . eg:

import org.apache.http.HttpResponse;
import org.apache.http.client.methods.HttpGet;
import org.apache.http.client.methods.HttpPost;
import org.apache.http.client.protocol.HttpClientContext;
import org.apache.http.impl.client.CloseableHttpClient;
import org.apache.http.impl.client.HttpClients;

import java.io.IOException;

/**
 * Created by y.wang on 11/16/16.
 */
public class HttpClientTest {
    public static void main(String[] args){
        CloseableHttpClient client = HttpClients.createDefault();
        HttpClientContext httpClientContext = new HttpClientContext();
        String url = "";
        HttpPost post = new HttpPost(url + "/login");
        try {
            HttpResponse response = client.execute(post, httpClientContext);
        } catch (IOException e) {
            e.printStackTrace();
        }
        httpClientContext.getCookieStore().clear();
    }
}

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